Hydrogen And Water Flashcards

1
Q

Metals react similarly to both

A

Dilute hydrochloric acid and dilute sulphuric acid

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2
Q

Magnesium reacts to dilute HCl with…

A

Rapid fizzing, the mixture gets very hot, colourless magnesium sulphate / chloride solution forms

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3
Q

Aluminium reacts with dilute HCL…

A

Slowly due to a coat of aluminium oxide. On heating this layer is removed and the aluminium fizzes a little like Mg

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4
Q

Zinc reacts with dilute HCl…

A

Slowly with cold dilute acid and may produce some effervescence. However it fizzes more on heating

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5
Q

Iron reacts with dilute HCl…

A

Slowly with cold dilute acid and will produce a bit of effervescence when heated

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6
Q

When hydrogen combusts

A

Bonds are broken in the hydrogen and oxygen molecules, which form new bonds if water molecules

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7
Q

The combustion of hydrogen is…

A

Exothermic and gives out water in the form of steam before it condenses into a liquid

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8
Q

The equation for the combustion of hydrogen is…

A

2H2(g) + O2(g) = 2H2O(l)

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9
Q

You test for water by…

A

Water turns anhydrous copper (II) sulphate blue

Turns cobalt chloride paper pink

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10
Q

Equation for water reacting which anhydrous copper sulphate

A

CuSO4(s) + 5H2O(l) = CuSO4•5H2O

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11
Q

You can check the purity of water by…

A

Checking it boils and freezes at the correct temperatures

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